package com.example.multi.service;

import com.example.multi.entity.User;
import org.springframework.scheduling.annotation.Async;

import java.util.List;
import java.util.concurrent.Future;

public interface IUserService {
    List<Integer> listUserId();

    User getUser(Integer userId);


    List<User> listUser_1();

    Future<List<User>> listUser_2();

    List<User> listUser_3();

    Future<List<User>> listUser_4();
}
